<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <button @click="isShow = !isShow">{{isShow?'隐藏':'显示'}}</button>
    <keep-alive>
      <home v-if="isShow"></home>
    </keep-alive>
  </div>
  <script src="./vue.js"></script>
  <script>
    const Home = {
      template: `
        <div>
          <h2>这是父组件</h2>  
          <input type="text" v-model="msg"/>
          {{ msg }}
        </div>
      `,
      data(){
        return {
          msg: ''
        }
      },
      mounted(){
        console.log('mounted');
      },
      beforeDestroy(){
        console.log('卸载之前');
      },
      activated(){
        console.log('activated');
      },
      deactivated(){
        console.log('deactivated');
      }
    }
    Vue.component('Home', Home)
    const vm = new Vue({
      el: '#app',
      data: {
        isShow: true
      }
    })
  </script>
</body>
</html>